Quoting Removed, click Modern View to seeYes, the resistors typically get very hot. Using the open (not encased) N tractor resistor (12250) connected to variable power supply, it is only warm at at an amp or two & resistance of a couple tenths of an Ohm, but increase that to 4 amperes & leave it powered for 1 to 2 minutes at 4A, & it becomes red (~800F) & will scorch paper touching it. Resistance goes up to over an Ohm.
Lower scope trace is current, upper is coil primary voltage.
To obtain ballast voltage, multiply current times value of resistor. Here, for example, the peak current was 3A & if the resistor was 1 Ohm, then the product would yield 3 Volt peak resistor voltage.
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Today's Featured Article - Women and Tractors, A Woman's Touch - by Teri Burkholder. I thought I would give you a little background on how I got myself hooked on tractors and their restoration. My family is a very "crafty" bunch of people. By crafty I mean good with crafts!! My Dad is a retired industrial engineer from Bucyrus Erie which made big shovels for excavating and he is also a wonderful wood worker. My mom and my "guardian angel" has had her own ceramic shop for 30 years and is an excellent painter. With these skills always active in our house it was hard not t
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